Reenforced fiber board box



May 14, 1935. K. w. PETERSEN 2,000,982

REENFORCED FIBER BOARD BOX Fil'd'Nov. 22, 1932 y2 sheets-sheet 2 L/ attorney l TMfTNf-g-"V Patented May 14, V1935 l y 2,000,082 nnENroncEn 0., nonna nox Karl W. heter-sen, Keokuk, Iowa, assigner of one- 'half to ltowa, Fiber Box tlompany, Keokuk, Iowa,- a corporation oli llliehware, anciens-halt ,'tofSouth West Box Company, Sand Springs, 0kla., a corporation oi! Delaware pplication November 22, 1932, Serial No. 643,900 5 ons. (ci, stat4-20) llhis invention relates to reenforced fiber board only the cover flaps, to be described, being slightly boxes, and among other objects, aims to provide above the tops f the frames. an especially strong, light-weight box which is To close the openings in the frames it and to sooonstruotod that it may be closed tightly by a provide cover aps, two end blanks es Shown in singlestrap, band 'or wire, and when once closed, Fig. 6 are employed. Each end blank is creased i 5 cannot be opened without so disguring the box to provide an end wall t9, a cover flap t@ and a that the fact of its having been opened is immelocking flange 2i, the endl Wall having .the didiately apparent. Afurther object is to construct menSiOnS 0f the end frame W, t0 which it, iS atthe box so that, even when lilled with heavy tached on thev inside as by staples. Each cover goods, it will not be twisted out of shape when iis-p t0 isof a length slightly greater than one- 10 picked up at one corner. Another object is to half the length of the box, so that the two cover makea box from wood reenforcements and pieces` mms Overlap W11@n the UOX is @10,5941- The 100k' of :aber board which wiii be satisfactory when ins anses t@ are tentv outwardly U11-ene cover used in the shipment of goods too heavy for a, iiap and inwardly on the other, as clearly shown' box made wholly of aber board. other objects in Fie. 1, and then are stapled down, the ar- 15 will appear in the fnwing description f the rangement being such that when both cover iiaps preferred embodiment of the invention shown in a1' e Closed, 011e Ofthe lking-allges @i engages the accompanying drawings, the other edgewise, as shown in Fig. 2. The nat- In-Said drawings; j ural tendency of the cover naps to spring out- Zo Fig. 1 is a perspective'ot the box shown open; Ward-iv Causes the looking anges to lock and to 20 Fig. 2 is a vertical longitudinal section through remain locked unless disengaged by some instruthe box shown Closed; ment, such as a screw driver. To secure the box Fig, 3 is an cmss section on une 3 3 of Fi@ 2; forshipment, a steel strap 22 or the like is stapled Fig 4 is a, perspective of one of the two Wooden or otherwise secured around the outer of the two end reenforcements used in the construction of cover aps adjacent the nterlocked flanges; and 25 me box; y when this is done, the box cannot be` tampered Fig. 5 is a Vplan view of the fiber board blank with Withmtt so injuring the flanges 2n as toma'ke ioiming me principal. part oi the box body; and. the Penng apparent at ne Fig. 6 is a plan view of one oi the liber board Another ,advamage of the locking aan@ ofthe 3c blmks which me used to form the and Walls and flanges resides in the fact that the box is con- 30 1m of the box. iaby sigengthezied intermeliatt'e hits ids e wo anges are m con ac t roug ou tiene shown in ris- 5 two emi vblanks shown in stm' being of doubled and mtfd Secam. "f

Fig 6 and two end enfments Shown in Fig ber board, the box is strongly resistant to twist- 35 t plus a band or strap of some sort together mg stresses and though heavily loadd my be with the desired nber of staples ciI the like. plcked up at either end and turned Without getting out of shape. The flaps it hold up the The blank in Fig' 5 1S shaped wd creased to pm' cover aps til and facilitate locking or unlocking f sr-ATE", orricl .v vide a bottom it, front and rear walls it, it, top them 40 5 of Fig. t, there being one at each end, as shown naps tt, Il@ and end naps it, it, lil, attached re- Spmively to the bottomf from and rem' Warns' stricted to the particular embodiment thereof This blank, when set up, 1s secured, as by staples, herein shown and described. v to the square wooden trame reenforcements it what I claim is:

l. A reenforced ber board box comprising a bottom, front and `rear Walls; end naps on the Obviously, the present invention is not rein Fig. '2. 'The mer in which the wooden 're-- @nfo'fmems 0f m'mes m me Secured t0 the' bottom, front and rear lwalls; wooden frames at blank- 1S shown in Fles. TL 2m@ 3 EMM 1`9men@ each end of the box set inside the aforesaid end 1S Set mSld@ the thle @Ild'aps |15, m, W, Whlvh flaps; means securing the aforesaid end flaps to 5c am then Secured by StapleS driven by a Staining the wooden frames; an end wall of fiber board 50 machine. AS Said. end DS are each as wide as secured inside each wooden frame; a cover flap the sides of the square frame it, each frame is integral with and hinged to each end wall, the covered bythe end flaps on three sides, only the two cover flaps overlapping and together comtop beingfe o i i as shown in Fig. 1. The top pletely closing the top of the box; each cover nap ts oi @son tiene 'i is nosh with the top of the box, having o looking aange on its free ons with which 55 the. other locking flange. automatically eng'ages when both cover iiaps are' closedI down, thereby to vlock the cover flaps together; each locking flange being made from a doubled-back portion oi' the cover flap, one of the fianges being un'- derneath, the other lbeing outside, its cover ap, and both ilanges engaging edgewise throughout their length.

2. A ber board box comprising a body and folding cover ilaps hinged to the body and overlapping each other to close the top uofthe body:v

and a locking flange extending crosswise of each flap at the end, the extent of the overlapping being such that said locking anges engage each other edgewise only and hold by friction, so that the flaps lock when the box is completely closed.

3. A rlber board box comprising a. body and folding cover flaps overlapping ,each other to close the top of the body; and a locking ilange extending crosswise of each flap at the end, said locking flanges being formed by end portions of the cover flaps doubled back and. secured to the cover flaps so as to lie vilat against opposite faces of the cover flaps andl engaging each other edgevwise only and holding by friction, so that the flaps lock when the boxis completely closed; said locking flanges stiifening the/box intermediate its ends against torsional stresses.

4. A nber board box comprising a body, and a pair of folding cover ilapshinged to the body and overlapping each other to close the top of the body; each flap having a flange contactingedgewise with the flange on the other ap when both aps are pushed down intobox-closing position; and a pair of longitudinal flapson the body so positioned as to support the cover flaps so that they tend to spring upwardly to be interlocked automatically.

5. A ilber board box comprising a bottom, two side walls, two end walls; cover flaps hinged to the tops of the end walls; naps hinged to the side walls and bent inwardly to extend over the top of the box at suchan elevation as to support the cover flaps; said cover ilaps overlapping at the middle of the box and each havingv a. iiange on its free end doubled back4 and secured to the cover flap to provide a shoulder extending transversely of the box; the cover flap which is underneath having its shoulder on the outside, and the cover flap which is outside having its shoulder underneath, and the parts being so constructed.

and arranged that when -the cover flaps are pushed down, said shoulders engage and hold by friction, thus keeping the box closed.

KARL WQ PETERSEN. 

